Galaxy S5 Battery Draining

Ive had my S5 For about a month now, And ive been having a lot of problems with battery draining! Battery drains Really fast which is not normal concidering the amount of good reviews the phone's battery had. Anything I can do to reduce battery draining ?
The phone lost 40% in under 2 hours!

The problem is, those stats are with very light usage of only browsing the web, but my friend got to 90% watching a 90mins video on netflix with some heavy gaming. And I saw online that some Gs5 lasts 2 days without charge so im kinda bumped..